5 (x+4) + x=6,3 (x-7) - 6x=-x, 2 (x+3/5) - x=3 1/5

5 (х + 4) + х = 6 3 (х - 7) - 6 х = - х

5 х + 20 + х = 6 3 х - 21 - 6 х = - х

5 х + х = 6 - 20 3 х - 6 х + х = 21

6 х = - 14 - 2 х = 21

х = - 14/6 х = 21 : (-2)

х = - 2 целых 1/3 х = - 10,5

2 (х + 3/5) - х = 3 1/5

2 (х + 0,6) - х = 3,2

2 х + 1,2 - х = 3,2

2 х - х = 3,2 - 1,2

х = 2

1) 5 (x + 4) + x = 6

5x + 20 + x = 6

6x = - 14 | : 6

x = - 2 1/3

2) 3 (x - 7) - 6x = - x

3x - 21 - 6x = - x

-3x - 21 = - x

-2x = 21 |: (-2)

x = - 10 1/2

3) 2 (x + 3/5) - x = 3 1/5

2x + 6/5 - x = 3 1/5

x + 6/5 = 3 1/5

x = 2